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| AMD-K6-2E Datasheet, PDF (304/332 Pages) Advanced Micro Devices – AMD-K6™-2E Embedded Processor | |||
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AMD-K6â¢-2E Processor Data Sheet
Preliminary Information
22529B/0âJanuary 2000
Figure 98 shows the thermal model of a processor with a passive
thermal solution. The ambient temperature (TA) is guaranteed
as long as TC is not violated. The case-to-ambient temperature
(TCA) can be calculated from the following equation:
TCA = PMAX ⢠qCA
= PMAX ⢠( qIF + qSA)
Where:
PMAX
qCA
qIF
qSA
= Maximum Power Consumption
= Case-to-Ambient Thermal Resistance
= Interface Material Thermal Resistance
= Sink-to-Ambient Thermal Resistance
Temperature
(Ambient)
Thermal
Resistance
(°C/W)
TCA
Sink
Case
Figure 98. Thermal Model
qSA
qCA
qIF
Figure 99 illustrates the case-to-ambient temperature
(TCA=TC â TA) in relation to the power consumption (X-axis)
and the thermal resistance (Y-axis). If the power consumption
and case temperature are known, the thermal resistance (qCA)
requirement can be calculated for a given ambient temperature
(TA) value.
286
Thermal Design
Chapter 16
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